I am posting to get some imput on winterizig my camper . Last year i used the red non-toxic antifreeze , and took forever to get it out one we started camping again . This time im trying the air meth...
If you should want to use antifreeze you should use a winterizing pump and pump the AF thru the fresh water inlet rather than putting it in the fresh water tank.
You would need to look behind the water heater and see if there are isolation/bypass valves there. Google Rv water heater bypass to see some examples.